Machine for threading piles of paper.



No. 628,885. Patented July II, [899.

G. A. W. EHRHARDT. MACHINE FOB THREADING PILES OF PAPER.

(Application filed July 25, 1898.) v (No Model. 4 Sheets-Sh88t l.

m: mums PETERS c0. vnmau'mm WASHINGTON, o. c.

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No. 628,885. Patented July ll, I8991.

G. A. W. EHRHARDT.

MACHINE FUR THREADING PILES OF PAPER.

(Application filed July 25, 1898.)

PHOfO-LITHQ, WASHINGTON, o c.

4 THE "cams PETGRS ca.

No. 628,885. Patented m u, I899. a. A. w. EHRHABDT. MACHINE FOR THREADING FILES OF PAPER.

(Application filed July 25, 1888.) 4 Sheets-Sheet a.

7 [z z/ enZT-F 5i) Q wamww K :5 W ai -"2 THE NORWS PEYERS CU FHDYD-UTHQ, WASHINGTON, D. C.

No. 628,885. Y. Y Patented July ll, I899. G. A. W. EHRHARIJT. M-ACIHNE FOR THREADING PILES OF PAPER.

- (Applicnfion filed Ju1y25, 1898.) (No Model.) 4 Sheets-Shoat 4.

llivirnn GEORG AUGUST W'ILHELM EHRHARDT, OF NEUMUNSTER, GERMANY.

MACHINE FOR THREADING PILES OF PAPER.

SPECIFICATION forming part of Letters Patent No. 628,885, dated July 1 l, 1899.

Application filed Jul 25, 1898. Serial No. 686,860. (No model.)

To aZZ whom it may concern:

Be it known that I, GEORG AUGUST WIL- HELM EHRHARDT, a subject of the King of Prussia, Emperor of Germany, residing at Neumiinster, Holstein, in the Kingdom of Prussia, Germany, haveinvented certain new and useful Improvements in Drilling and Threading Machines for Piles of Paper Bags and the Like, (for which I have applied for patents in Austria,vdated June 18, 1898; in Hungary, dated June 18, 1898; in France, dated June 22, 1898; in Belgium, dated June 22, 1898; in Switzerland, dated June 17, 1898; in Germany, dated September 24, 1897; in Sweden, dated June 17, 1898; in Norway, dated June 21, 1898, and in Denmark, dated June 22, 1898,) of which the following is a specification.

Paper sheets, paper bags, sacks, and the like are threaded and hung up in a convenient place for the purpose of having them at hand and of enablingthem being readily taken for use. This threading is effected almostwholly by hand, and is therefore an extremely tedious operation, and in the case of strong paper it is also very tiring. Recently it has been tried to effect these operations by means of machines, but without success, because on the one hand the needle when forced through the paper is readily bent and then goes astray or crooked, or breaks 0E completely, While on the other hand the holes are extremely liable to get torn by the forcing through of the needle.

Now this invention relates to a machine for effecting the above objects while obviating all the above drawbacks in every respect.

This machine is illustrated in the accompanying drawings, in which- Figure l is a side elevation with the frame )artl omittedand Fi 1 is a view simi lar to Fig. 1, showing the relative position of the parts when the treadle is depressed and the needle-driver in engagement with the needle-block. Fig. 2 is a front elevation. Figs. 3to 1O illustrate details of the ma chine on a larger scale. Figs. 3,and 4 illustrate the needle-driver in side elevation and threads after they are drawn through. Fig.

9 illustrates the connection of the drillingspindle with its operating-lever in vertical section. Fig. 10 is a section 011 the line A B of Fig. 9.

The machine consists, essentially, of the device for boring a hole for the thread to be drawn through, of the device for drawing the thread through, and of the device for cutting the thread. The first device consists of a sleeve 5, which is pivotally mounted in the frame a and which serves to receive the drillspindle d, that is fixed to the lever c, with the drill f fixed therein. The spindle d is capable, by reason of being coupled with the sleeve by means of the pin 9 and slot h, of being rotated by the cord-pulley i by means of a cord passing over the pulley k and guidepulleys Z. The spindle is also capable of being raised and lowered by the operation of the lever c. For this purpose the drill-spindle is turned down or stepped at its upper end and a ring q, provided with pins 10, is slipped over it. This ring is prevented from falling down by means of a plate r and screws 8'. The pins of this ring engage, as shown in Fig. 10, in the slots 75 of the fork of the lever c, from which a rod m leads to a one-armed lever 11, which is fixed below the frame tableplate and which is connected by means of a rod 0 with the treadle-lever p. The lever it serves as needle-driver, and is constructed for this reason at its front free end with a fork q, in which, as shown in Figs. 3 and at, there are provided slot-holes r, through which pass the pins 8 of a ton gue-piece t, which engages at its rear end with a nose under the shoulder to of the fork and which is constantly pulled into the fork by means of a spiral spring y. The pins 3 of the tongue-piece 25 project from the slots of the fork and engage, as shown in Fig. 1, in slots in a guide-piece 20. Furthermore, guide-rods :0 (shown in Figs. 5 and 6) are fixed below the table-plate, and upon these guiderods there is movably mounted a block a, that holds the needle 2. This block is either made purposely so heavy that, notwithstanding any frictional resistances which may be met by the needle and the inserted thread in the pile of paper, the said block will draw, down the needle with certainty or the said block may be weighted with a separate weight or may be pressed down by means of spiral springs arranged on the guide-rods over said block. The guide to and the guide-rodsware situated, not parallel to each other, but converging, whereby the tongue t of the lever 42 is enabled to'take under the needle-block when the lever is drawn down, while it is enabled to release the same when the lever is in a horizontal position. Approximatelyon the same level as the lever a there is arranged a gripperlever 1), whose nose is constantly pressed into the path of the needle-block by means of a spring 0. Directly under the table-plate at the end of a slot, Fig. 8, which extends from the working holein the table-plate to the front edge of the table there is fastened an anglepiece (1, which is formed with a notch or recessf, the edges of which are sharpened after the manner of scissors. In front of these edges there works a knife g, which is caused to oscillate by the machine by means of the crankrod 77/, crank i, shaft and the cord-pulleys Z and m.

The mode of operation of the machine is as follows: When a thread has been drawnthrough the eye situated in the upper end of the needle, the pile of paper to be threaded is pushed under the raised presser-foot n. It is then let go, whereupon it is caused b its tension-spring to press down the pile. Then by throwing the machine into gear the drillspindle is caused to rotate and the treadlelever 19 is moved down, whereby the drillspindle, with its drill, is also moved down. In this manner the drill drills a hole through the pile of paper; but at the same time the needle-driver n has also been moved down and its tonguepiecet in moving upward has passed the needle-block a and has moved under the same. If, now, the treadle-lever be released, the spring 0' will draw it up again, while at the same time the lever c and the lever 12 rise, whereby the drill and the needleblock are also raised. The .drill moves out of the pile of paper, while the needle-block pushes the needle 2, contained in it, together with its thread, through the drill-hole, so that the needle projects about thirty millimeters out of the pile. At the end of the stroke of n the tongue i leaves the block through the mutually-inclined positions of w and Q3, and the block descends, together with the needle, until it comeswithin the reach of the nose of the lever Z). In this manner there has been formed at the projecting part of the needle a loop of string or thread, which is seized by the attendant of the machine and is held fast by him. Then on drawing back the gripping-leverthe block falls into its original position, and thus draws the needle with it, while the eye of the needle slides along the thread, which is being held fast. The pile of paper is now, together with the thread that is held fast, drawn out from under the raised presser-foot, while the thread slides along in the above-mentioned slot inthe table-plate and is cut when it arrives at the knife g. The pile is now ready to be tied up and the threading of the second pile can now begin.

WVhat I claim, and desire to secure by Letters Patent of the United States, is

1. I11 a machine for threading paper sheets arranged in piles, the combination with a drill and its longitudinally-movable spindle, of a lever to move said drill and spindle, a needle to carry the thread placed and arranged in guides on the opposite side of the paper pile and in the same line with the drill, a needledriver, alever connected to thedrill-lever and on which said driver is movable, and a guide to carry the needle-driver under a block in which the needle is held and to withdrawit at a proper point on the upward movement of the needle, substantially as described.

2. The combination with adrill and a longitudinally-movable drill-spindle, of a lever to move the same, a needle arranged in guides on the opposite side of the paper pile, a needle-driver, a lever connected to the drill-lever to carrythe needle-driver in guides which converge toward the line of movement of the needle, and a spring-pressed needle'gripper to hold the needle after it has passed through the paper, substantially as described.

3. The combination with a drill and a longitudinally-movable drill-spindle, a lever to move said drill, a needle placed in guides in line with said drill but on the opposite side of the pile of paper, a lever connected to the drill-lever, a needle-driver having pins lying in slots in thearms of a fork on theend of said lever, a spring connecting the driver to said lever, a guide for said pins converging toward the line of movement of the needle, a gripper to hold the needle after passing through the paper, and a cutter to automatically sever the thread, substantially as described.

l. The combination with a needle movable in guides upon the lower side of a table supporting a pile of paper, of a needle-driver, a leveron which said driver is movable, a guide to carry said driver into engagement with a block carrying the needle, a spring-actuated gripper to arrest the return movement of said needle, and a cutter consisting of a fixed blade on the lower side of the table having a notch in line with a threadsl0t in the table of, and a reciprocating blade driven by the machine, substantially as described.

In testimony whereof I have hereunto set my hand in the presence of two witnesses.

GEORG AUGUST WlhllEhM EHRHARDT.

YVitnesses:

HERM. MtiHL, GERoL L. MEY R. 

